Antifriction-bearing



(No Model.)

J. R. CORYELL. ANTIFRIGTION BEARING.

Patented Jan. 11, 1898.

@3% Elkton/ww l (No ModeLY 2 Sheets-Shea?l 2.

J. R. CORYELL. ANTIFRIGTION BEARING.

4 10.597,175. Patented Jan. 11, 1898.-

W mg m Nirnn STATES PATENT reins.

JOHN R. OORYELL, OF SAN FRANCISCO, CALIFORNIA.

ANTlFRlCTlON-BEARING.

SPECIFICATION forming part of Letters Patent No. 597,175, dated January 11, 1898.

Application iiled I une 28, 1897. Serial No. 642,776. (No model.)

To all when?, t 7oz/ay concern,.-

Be it known that I, JOHN R. CORYELL, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Antifriction- Bearings; and I do hereby declare the following to be a full, clear, and exact description of said invention, such as will enable others skilled in the art to which it most nearly appertains to make, use, and practice the same.

Thisinvention has relation to antifriction journal-bearings, and more particularly to what has been termed rollcnbearings The chief objectof the said invention is to protect the bearing-rollers against the end thrust of the journal and to brace the various parts of the journal-box against strain.

'Io this end the said invention consists in the combination of parts hereinafter particularly set forth and claimed.

Figure l is, a sectional vieu7 of the casing and antifriction-bearing frame, showing the journal and antifriction rollers and balls in elevation. Fig. l is an end view of the jour- :nal and antifriction rollers andirame. Fig.

3 is a detail view of the rollers, being partly in section to show the pivotal hangings of the same.

Heretofore roller-bearings have been to a great extent rendered impracticable for adoption in many instances by reason of the added bulk which their construction has entailed and also by a great amount of complication caused by the use of a large number of operative parts in the construction of these bearings and also from the fact that they7 have not provided for a possible disadjustment of the bearing on the journal. To overcome these various objections is the object of this present invention.

I have discovered that no greater number than four rollers is required to maintain the very best antifriction results. The rollers A it has been found advantageous to construct of a smaller size thanl has been usually employed. The rollers A are mounted in a frame consisting of cross-hars B2 and circular end pieces B, connected thereby, in which end pieces the rollers are mounted on the pins B and bear against the shaft snugly.

The pins B' are set rigidly in the end pieces B and eX- tend into sockets in the ends of the rollers A. To maintain the rollers in the position on the journal X, the journal is provided in thev outer end with the groove O, which is rectangular in cross-section,to receive the single ball D. This ball is inclosed by the said groove C and the cap E, which when placed in position forms With the end piece of Ythe frame the counterpart. of the groove C, and with the groove C an annular chamber rectangular in cross section surrounding the end of the shaft. The groove O in the end of the shaft and the cap E equally divide the annular chamber. By means of this construction the center of the ball D is brought at a level with the parting of 'the chamber, so that any displacement Which would be caused by an endwise movement is received upon the ball immediately, not allowing any movement, such as Would occur were the parting-lines of the groove O and the cap E to either side the center of the ball. The cap E is secured in position on the outer end piece B by means of screws E. lVhen there now occurs any displacement of the journal by reason of end thrust, the bearing is compelled to move with the journal, being held in its relative position by the ball D.

In the construction of the casing D2 the objects sought to be obtained are to produce a box dust-proof and one Which will resist the full crushing strain as a solid construction. It is with this purpose that the box is inclosed at opposite ends by the screw-threaded plugs F F'. Both of these plugs are set in the frame of the casing, being provided with screwthreads for that purpose, as shown in the drawings, Fig. l. Both are hollowed out to give suicient play to the roller-bearings.

In th plug F provision is made to receive the cap F2, which 'is set on the plug F by a screw-thread construction similar to that in which the plug F is set in the frame of the journal-box. `The purpose of this cap F2 is to receive the end thrust of the journal, the saine being thereby conveyed to the casing and not to the bearing-rollers. For this purpose the journal is provided with the groove O', outside of the casing. This groove is formed by the collar X' and the internal IOO shoulder X3, integrally formed upon the journal or shaft X. An annular chamber C2, rectangular in cross-section, is formed by the outer face of the plug F' and a recess in the cap F2 and the groove C when the same are drawn together by means of the screw-thread construction above referred to. The partingwalls of this square annular chamber are formed to part on a line with the center of the single ball D', which is placed in this annular chamber. The reason for this con struction is similar to that above described with reference to the ball D and the chamber O.

Between the inner surface of the cap F2 and the shoulder X2on the shaft any suitable form of bushing or packing may be placed, its ofr ce being to prevent the admission of dust into the groove C'. Should, however, this be omitted, it will be at once perceived that the dust, if it got through the parting of the said shoulder and cap F2, would be received in the chamber C and not obtain admission into the casing in which the rollers A are operating.

lWhen the bearing rollers within their frame have been applied to the journal and it is sought for any reason to remove them, this might be readily accomplished by unscrewing the plug F from the outer face of the casin g to expose the journal and the bearing-rollers. In doing so the cap E is exposed, so that the screws E may be withdrawn and the cap -E removed. Vhen this cap E is removed, the ball D falls from its position and there is nothing to prevent the withdrawal of the frame carrying the rollers A as one piece. The reverse of this operation is followed when the bearing frames and rollers are to be inserted.

`With the plugs F F in position and driven snugly home, so as to iill the screw-thread completely, it will be observed that the casing is rendered as nearly solid to all Vertical strains as it is possible, while within the interior of the journal-box formed by these caps the rollers are fitted snugly in the space between `the journal and the interior surface of the casing.

By using the single balls D D' in the annular chambers of the form described and the I framing about the same I obtain all of the advantages possible in the avoidance of friction, as the balls are caused to rotate by the contact of two points on their surface only and those being in direct line with the thrust and not at an inclination thereto. I have discovered that the use of a single ball gives me all of the effect desired without any of the additional friction which might be caused by the adjacent surfaces of more balls abutting and grinding against each other.

Having thus described this invention, I claiml. In combination with a journal having two annular grooves near its ends, respectively, of a pair of caps internally recessed to form with said grooves a pair of annular chambers, a ball in each chamber to take the end thrust of the said journal, a casing, means for fastening one of said caps to said casing, a frame attached to the other cap and provided with end pieces, and a set of antifrictionrollers mounted in the said end pieces, substantially as set forth.

2. A set of antifriction-rollers andthe frame 'in which they are mounted, in combination with a journal with which the said rollers are in contact, a casing surrounding the same, a pair of plugs'for the ends of the said casing, a cap attached to one of the said plugs and having an internal recess which combines with an annular groove of the said journal to make an annular chamber, and a ball arranged in the said chamber, substantially as set forth.

3. In combi-nation with a journal annularly grooved at its inner end, a set of antifrictionrollersl in contact therewith, a frame in which the said rollers are mounted, a casing which incloses them, an attachment of the said cas ing which is recessed to form an annular chamber with the said groove of the journal, and a ball in this chamber substantially as and for the purpose set forth.

4. In combination with a set of antifrictionrollers and an inclosing casing, a journal whichis annularly grooved at its outer end ,and arranged centrally with respect to the isaid rollers, a frame in which the said rollers are mounted, a cap which is attached to the said frame and vrecessed to form with the said ,groove an annular chamber, and a ball arranged in the said chamber, substantially as set forth.

In testimony whereof I have hereunto set my hand this 30th day of April, 1897.

JOHN R. CORYELL.

Wvitnesses:

BALDWIN VALE, N onMANv MCKELLAR.

ICO 

